Ranunculus acris is distinguished from R. bulbosus by its slender cylindrical flower-stalk, that of R. bulb. being furrowed. Both are common "buttercups," and have acrid and poisonous properties. R. acris was proved by Franz and Lembke, and the chief skin symptoms were observed in a woman of seventy who applied a handful of the herb to her limbs, with the result of setting up violent constitutional symptoms and fever and intense inflammation, going on to gangrene of the skin of the legs. In the provers a pain of a rheumatic character was experienced in the muscles and joints, especially ankles and wrists, which occurred when walking and also when at rest. Lumbar pains < on bending or turning the body. Heat, faintness, and fever.